/* w_resrc.c:  Get resources (from files)
 *
 * Micropolis, Unix Version.  This game was released for the Unix platform
 * in or about 1990 and has been modified for inclusion in the One Laptop
 * Per Child program.  Copyright (C) 1989 - 2007 Electronic Arts Inc.  If
 * you need assistance with this program, you may contact:
 *   http://wiki.laptop.org/go/Micropolis  or email  micropolis@laptop.org.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.  You should have received a
 * copy of the GNU General Public License along with this program.  If
 * not, see <http://www.gnu.org/licenses/>.
 * 
 *             ADDITIONAL TERMS per GNU GPL Section 7
 * 
 * No trademark or publicity rights are granted.  This license does NOT
 * give you any right, title or interest in the trademark SimCity or any
 * other Electronic Arts trademark.  You may not distribute any
 * modification of this program using the trademark SimCity or claim any
 * affliation or association with Electronic Arts Inc. or its employees.
 * 
 * Any propagation or conveyance of this program must include this
 * copyright notice and these terms.
 * 
 * If you convey this program (or any modifications of it) and assume
 * contractual liability for the program to recipients of it, you agree
 * to indemnify Electronic Arts for any liability that those contractual
 * assumptions impose on Electronic Arts.
 * 
 * You may not misrepresent the origins of this program; modified
 * versions of the program must be marked as such and not identified as
 * the original program.
 * 
 * This disclaimer supplements the one included in the General Public
 * License.  TO THE FULLEST EXTENT PERMISSIBLE UNDER APPLICABLE LAW, THIS
 * PROGRAM IS PROVIDED TO YOU "AS IS," WITH ALL FAULTS, WITHOUT WARRANTY
 * OF ANY KIND, AND YOUR USE IS AT YOUR SOLE RISK.  THE ENTIRE RISK OF
 * SATISFACTORY QUALITY AND PERFORMANCE RESIDES WITH YOU.  ELECTRONIC ARTS
 * DISCLAIMS ANY AND ALL EXPRESS, IMPLIED OR STATUTORY WARRANTIES,
 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
 * FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS, AND WARRANTIES (IF ANY) ARISING FROM A COURSE OF DEALING,
 * USAGE, OR TRADE PRACTICE.  ELECTRONIC ARTS DOES NOT WARRANT AGAINST
 * INTERFERENCE WITH YOUR ENJOYMENT OF THE PROGRAM; THAT THE PROGRAM WILL
 * MEET YOUR REQUIREMENTS; THAT OPERATION OF THE PROGRAM WILL BE
 * UNINTERRUPTED OR ERROR-FREE, OR THAT THE PROGRAM WILL BE COMPATIBLE
 * WITH THIRD PARTY SOFTWARE OR THAT ANY ERRORS IN THE PROGRAM WILL BE
 * CORRECTED.  NO ORAL OR WRITTEN ADVICE PROVIDED BY ELECTRONIC ARTS OR
 * ANY AUTHORIZED REPRESENTATIVE SHALL CREATE A WARRANTY.  SOME
 * JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON IMPLIED
 * WARRANTIES OR THE LIMITATIONS ON THE APPLICABLE STATUTORY RIGHTS OF A
 * CONSUMER, SO SOME OR ALL OF THE ABOVE EXCLUSIONS AND LIMITATIONS MAY
 * NOT APPLY TO YOU.
 */
#include "sim.h"

#ifdef MSDOS
#    define PATHSTR	"%s\\%c%c%c%c.%ld"
#    define PERMSTR	"rb"
#else
#    define PATHSTR	"%s/%c%c%c%c.%ld"
#    define PERMSTR	"r"
#endif

char *HomeDir, *ResourceDir, *KeyDir, *HostName = "";

struct Resource *Resources = NULL;

struct StringTable
{
    QUAD id;
    int lines;
    char **strings;
    struct StringTable *next;
}          *StringTables;

Handle GetResource(char *name, QUAD id)
{
    struct Resource *r = Resources;
    char fname[256];
    struct stat st;
    FILE *fp = NULL;

    while(r != NULL)
    {
        if((r->id == id) && (strncmp(r->name, name, 4) == 0))
        {
            return ((Handle) & r->buf);
        }
        r = r->next;
    }

    r = (struct Resource *) ckalloc(sizeof(struct Resource));

    r->name[0] = name[0];
    r->name[1] = name[1];
    r->name[2] = name[2];
    r->name[3] = name[3];
    r->id = id;

    sprintf(fname, PATHSTR, ResourceDir, r->name[0], r->name[1], r->name[2], r->name[3], r->id);

    if((stat(fname, &st) < 0) ||
       ((r->size = st.st_size) == 0) ||
       ((r->buf = (char *) ckalloc(r->size)) == NULL) ||
       ((fp = fopen(fname, PERMSTR)) == NULL) || (fread(r->buf, sizeof(char), r->size, fp) != r->size))
    {
        if(fp)
            fclose(fp);
        r->buf = NULL;
        r->size = 0;
        fprintf(stderr, "Can't find resource file \"%s\"!\n", fname);
        perror("GetResource");
        return (NULL);
    }
    fclose(fp);
    r->next = Resources;
    Resources = r;
    return ((Handle) & r->buf);
}

void ReleaseResource(Handle r)
{
}

QUAD ResourceSize(Handle h)
{
    struct Resource *r = (struct Resource *) h;

    return (r->size);
}

char *ResourceName(Handle h)
{
    struct Resource *r = (struct Resource *) h;

    return (r->name);
}

QUAD ResourceID(Handle h)
{
    struct Resource *r = (struct Resource *) h;

    return (r->id);
}

void GetIndString(char *str, int id, short num)
{
    struct StringTable **tp, *st = NULL;
    Handle h;

    tp = &StringTables;

    while(*tp)
    {
        if((*tp)->id == id)
        {
            st = *tp;
            break;
        }
        tp = &((*tp)->next);
    }
    if(!st)
    {
        QUAD i, lines, size;
        char *buf;

        st = (struct StringTable *) ckalloc(sizeof(struct StringTable));
        st->id = id;
        h = GetResource("stri", id);
        size = ResourceSize(h);
        buf = (char *) *h;
        for(i = 0, lines = 0; i < size; i++)
            if(buf[i] == '\n')
            {
                buf[i] = 0;
                lines++;
            }
        st->lines = lines;
        st->strings = (char **) ckalloc(size * sizeof(char *));
        for(i = 0; i < lines; i++)
        {
            st->strings[i] = buf;
            buf += strlen(buf) + 1;
        }
        st->next = StringTables;
        StringTables = st;
    }
    if((num < 1) || (num > st->lines))
    {
        fprintf(stderr, "Out of range string index: %d\n", num);
        strcpy(str, "Well I'll be a monkey's uncle!");
    }
    {
        strcpy(str, st->strings[num - 1]);
    }
}
